Neural basis of responses to sex pheromones, Biology

Neural Basis of Responses to Sex Pheromones

The ability of insects to detect and discriminate between a variety of pheromones with great sensitivity depends on the presence of specific neural structures in the neuropile of the male antennal lobes. The female antennal lobe lacks these structures. The electrophysiological signals resulting from interaction between pheromonal molecules and antennal olfactory receptors are passed via the olfactory nerve to the specific part of the brain containing specific neural circuitary to decode complex pheromonal signals.

The brain then translates pheromonal information into the act of directional locomotion or orientational responses. There are pheromones that act more slowly and have longer lasting effects. For example, if a newly fertilised female mouse is caged with a strange male, the odor of that male will terminate pregnancy. The pheromone responsible comes from the urine of the male. It is received by the olfactory receptors of the female and triggers activity in the hypothalamus which directs the pituitary to release a hormone that reduces the steroid hormone output of the ovaries. The uterus does not receive adequate hormones for implantation of foetus and the pregnancy aborts.

Posted Date: 1/17/2013 1:33:16 AM | Location : United States

Related Discussions:- Neural basis of responses to sex pheromones, Assignment Help, Ask Question on Neural basis of responses to sex pheromones, Get Answer, Expert's Help, Neural basis of responses to sex pheromones Discussions

Write discussion on Neural basis of responses to sex pheromones
Your posts are moderated
Related Questions
Q. How can the presence, function of muscular tissue and localization in beings of the phylum Annelida is explained? In these beings there are a longitudinal muscular layer und

Q. Concerning the mixture of arterial with venous blood what is the difference between the adult circulation and the human fetal circulation? In the human fetal circulation the

Q. How are nutrients distributed through the digestive system in planarias? Planarias have single opening digestive system incomplete with ramifications that transport nutrient

Explain the barrier function in the cornea. Barrier Function: It is the first line of barrier between the external environment and the corneal stroma. The superficial epi

Some organisms contain enzymes that condense a fatty alcohol and a fatty acid to generate wax esters. Draw decanol, plamitic acid (C16:0 fatty acid) and the resulting wax ester gen

what is the deference between sp. and spp.?

Explain Doxycycline Doxycycline, which frequently causes gastrointestinal disturbances and can cause photosensitivity and vaginitis, offers an inexpensive once-daily alternative

Flow cytometry is an analysis of biological material by detection of light- absorbing or fluorescing properties of cells or subcellular fractions (that is chromosomes) passing in

explain the relationship between concentration gradient and active and passive transport

Adaptive Radiations The organisms all the time tend to establish harmony with their environment. This process, called adaptation, enables the organism to face the vagaries of